crypto: caam/qi2 - fix return code in ahash_finup_no_ctx()

ahash_finup_no_ctx() returns -ENOMEM in most error cases,
and this is fine for almost all of them.

However, the return code provided by dpaa2_caam_enqueue()
(e.g. -EIO or -EBUSY) shouldn't be overridden by -ENOMEM.
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/caamalg_qi2.c

@@ -4004,7 +4004,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
 	int digestsize = crypto_ahash_digestsize(ahash);
 	struct ahash_edesc *edesc;
 	struct dpaa2_sg_entry *sg_table;
-	int ret;
+	int ret = -ENOMEM;
 
 	src_nents = sg_nents_for_len(req->src, req->nbytes);
 	if (src_nents < 0) {
@@ -4017,7 +4017,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
 					  DMA_TO_DEVICE);
 		if (!mapped_nents) {
 			dev_err(ctx->dev, "unable to DMA map source\n");
-			return -ENOMEM;
+			return ret;
 		}
 	} else {
 		mapped_nents = 0;
@@ -4027,7 +4027,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
 	edesc = qi_cache_zalloc(GFP_DMA | flags);
 	if (!edesc) {
 		dma_unmap_sg(ctx->dev, req->src, src_nents, DMA_TO_DEVICE);
-		return -ENOMEM;
+		return ret;
 	}
 
 	edesc->src_nents = src_nents;
@@ -4044,6 +4044,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
 					  DMA_TO_DEVICE);
 	if (dma_mapping_error(ctx->dev, edesc->qm_sg_dma)) {
 		dev_err(ctx->dev, "unable to map S/G table\n");
+		ret = -ENOMEM;
 		goto unmap;
 	}
 	edesc->qm_sg_bytes = qm_sg_bytes;
@@ -4054,6 +4055,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
 	if (dma_mapping_error(ctx->dev, state->ctx_dma)) {
 		dev_err(ctx->dev, "unable to map ctx\n");
 		state->ctx_dma = 0;
+		ret = -ENOMEM;
 		goto unmap;
 	}
 
@@ -4080,7 +4082,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
 unmap:
 	ahash_unmap_ctx(ctx->dev, edesc, req, DMA_FROM_DEVICE);
 	qi_cache_free(edesc);
-	return -ENOMEM;
+	return ret;
 }
 
 static int ahash_update_first(struct ahash_request *req)